TNFSF4 and systemic lupus erythematosus: Case-only analysis reveals association of TNFSF4 risk variants with autoantibody production in African-American, European and Hispanic SLE cohorts: Evidence of association of rs2205960-T with Anti-Sm autoantibodies in African-American cases (P = 5.1×10−3, OR = 1.57(95% CI 1.14–2.16) is reinforced by testing this variant against controls (P = 6.67×10−7, OR = 1.91(1.47–2.47)).